Doubtful and Undubitable
Opposite meaning words
Doubtful
Doubtful adjective - Not feeling sure about the truth, wisdom, or trustworthiness of someone or something.
Undubitable is an antonym for doubtful.
Undubitable
Cite this Source
Undubitable and Doubtful. (2016). Retrieved 2026, August 08, from https://thesaurus.plus/related/doubtful/undubitable
Doubtful & Undubitable. N.p., 2016. Web. 08 Aug. 2026. <https://thesaurus.plus/related/doubtful/undubitable>.
Undubitable or Doubtful. 2016. Accessed August 08, 2026. https://thesaurus.plus/related/doubtful/undubitable.
Google Ngram Viewer shows how "doubtful" and "undubitable" have occurred on timeline